Mercurial > hg > graal-compiler
diff src/share/vm/opto/live.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/opto/live.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,74 @@ +/* + * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +class Block; +class LRG_List; +class PhaseCFG; +class VectorSet; +class IndexSet; + +//------------------------------PhaseLive-------------------------------------- +// Compute live-in/live-out +class PhaseLive : public Phase { + // Array of Sets of values live at the start of a block. + // Indexed by block pre-order number. + IndexSet *_live; + + // Array of Sets of values defined locally in the block + // Indexed by block pre-order number. + IndexSet *_defs; + + // Array of delta-set pointers, indexed by block pre-order number + IndexSet **_deltas; + IndexSet *_free_IndexSet; // Free list of same + + Block_List *_worklist; // Worklist for iterative solution + + const PhaseCFG &_cfg; // Basic blocks + LRG_List &_names; // Mapping from Nodes to live ranges + uint _maxlrg; // Largest live-range number + Arena *_arena; + + IndexSet *getset( Block *p ); + IndexSet *getfreeset( ); + void freeset( const Block *p ); + void add_liveout( Block *p, uint r, VectorSet &first_pass ); + void add_liveout( Block *p, IndexSet *lo, VectorSet &first_pass ); + +public: + PhaseLive( const PhaseCFG &cfg, LRG_List &names, Arena *arena ); + ~PhaseLive() {} + // Compute liveness info + void compute(uint maxlrg); + // Reset arena storage + void reset() { _live = NULL; } + + // Return the live-out set for this block + IndexSet *live( const Block * b ) { return &_live[b->_pre_order-1]; } + +#ifndef PRODUCT + void dump( const Block *b ) const; + void stats(uint iters) const; +#endif +};